Let us we consider two resistors in series, both with the same dimensions, and the same effective mass. The first resistor has a scattering rate T₁¹, and the second has a scattering rate of T2¹. They both have area A and length L and the same charge density and effective masses. (i) (ii) Calculate the total resistance, then by treating the total resistance of the circuit as a resistor of length L, area A, show that the total scattering rate for the combined circuit, T7¹ can be written as T7¹ = T¹+T₂¹. If T¹=100 Terahertz, and T2¹-AT where A=0.3 Terahertz/Kelvin and T is the temperature, assuming that n, e and m* remain constant, sketch the dependence of the conductivity on the temperature. If the fermi energy is 12 eV and the effective mass is 0.4me what is the conductivity at room temperature (303 K)?
Let us we consider two resistors in series, both with the same dimensions, and the same effective mass. The first resistor has a scattering rate T₁¹, and the second has a scattering rate of T2¹. They both have area A and length L and the same charge density and effective masses. (i) (ii) Calculate the total resistance, then by treating the total resistance of the circuit as a resistor of length L, area A, show that the total scattering rate for the combined circuit, T7¹ can be written as T7¹ = T¹+T₂¹. If T¹=100 Terahertz, and T2¹-AT where A=0.3 Terahertz/Kelvin and T is the temperature, assuming that n, e and m* remain constant, sketch the dependence of the conductivity on the temperature. If the fermi energy is 12 eV and the effective mass is 0.4me what is the conductivity at room temperature (303 K)?
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Transcribed Image Text:Let us we consider two resistors in series, both with the same dimensions, and the same
effective mass. The first resistor has a scattering rate t, and the second has a scattering
rate of t71. They both have area A and length L and the same charge density and effective
masses.
(i)
Calculate the total resistance, then by treating the total resistance of the circuit as a
resistor of length L, area A, show that the total scattering rate for the combined
circuit, t' can be written as t, = t1 +t7.
If t1=100 Terahertz, and t,1=AT where A=0.3 Terahertz/Kelvin and T is the
temperature, assuming that n, e and m* remain constant, sketch the dependence of
the conductivity on the temperature.
If the fermi energy is 12 eV and the effective mass is 0.4me what is the conductivity
at room temperature (303 K)?
(ii)
(iii)
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